| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
2024 Undergraduate Student Poster Contest
|
| Presentation Title |
SPU-24: Can Titanium in Stainless Steel Diminish Corrosion Resistance? |
| Author(s) |
Aryn Loew, Clinton L. Hawkins, Ashley J. Galligan, Terry C. Lowe |
| On-Site Speaker (Planned) |
Aryn Loew |
| Abstract Scope |
Even in stainless steels, corrosion can be a major issue and cause of failure due to deterioration of the chromium-oxide protective layer. Consensus standards for the composition of most austenitic stainless steel do not specify limits for titanium, yet significant concentrations have been measured in AISI Types 304, 304L, and 305 alloys. This leads to the question; can titanium diminish the corrosion resistance? Titanium has a high affinity for carbon and suppresses the formation of chromium carbides which has long been believed to increase the corrosion resistance. However, titanium carbide is strongly cathodic with respect to iron and in the presence of anions such as chlorine can increase corrosion. Additionally, titanium acts to lower the stacking fault energy causing more intense slip bands, fissures, and martensite formation during manufacturing. Slip bands and fissures disrupt the chromium oxide layer exposing the titanium carbides, making the steel more susceptible to environmental corrosion. |